French press is the way to go. The coffee you get from your effort is completely worth it. Rinsing out a press takes about 20 seconds. If you grind your own fresh roasted coffee, then the cup you get from your french press is light years ahead of anything a Keurig can vomit out. Plus the grounds can be poured on your azaleas and hydrangeas for a mack daddy fertilizer!
So, if you hate coffee and the environment, go for the K cup. If you love coffee and mother earth, do the french press.